What safety feature helps prevent vehicles from rolling backward on an incline?

The hill start assist feature is specifically designed to prevent vehicles from rolling backward when starting on an incline. When a driver pauses on a slope, this feature temporarily holds the brakes after the driver releases the brake pedal, allowing the driver to smoothly transition from the brake to the accelerator without worrying about the vehicle rolling back. This is particularly useful in situations where the incline is steep, giving the driver confidence to start moving forward safely without the stress of potential rollback.

Other systems like stability control, anti-lock braking systems, and cruise control serve different purposes and do not directly address the issue of starting and stopping on an incline. Stability control focuses on maintaining the vehicle's stability during turns, anti-lock brakes prevent wheel lock-up during hard braking, and cruise control maintains a steady speed on flat terrain. Thus, the hill start assist feature is the correct answer for preventing backward rolling on inclines, highlighting its importance in enhancing safety during those specific driving situations.